const obj = {}
const arr = []
const fn = ()=>{}

console.log(obj instanceof Object)  //true
console.log(arr instanceof Array)  //true
console.log(arr instanceof Object)  //true
console.log(fn instanceof Function) //true
console.log(fn instanceof Object)   //true

function Test(){

}
const data = new Test()
console.log(data.__proto__ === Test.prototype)
console.log(Test.prototype)

